我作的考勤登录系统,意图是用 recordYear, recordMonth, recordDay,Iswork限制一天用户不能重复登录。但结果总是达不到要求。我也加了判断Iswork是否等于1的判断语句，但不能用。垦求各位前辈多帮助。指出问题哪里？？

<%
if Request.Form("action")="true" then
   username=trim(Request.Form("username"))      '登录用户名
  password=trim(Request.Form("password"))      '登录密码
  otherpwd = Trim(Request.form("otherpwd"))    '附加码
  reotherpwd = Trim(Request.form("reotherpwd"))'生成的附加码
  
  legalTag=checkenter()

  If legalTag=TRUE then '如果没有非法输入，则进行用户验证
    if otherpwd = reotherpwd then  '附加码比较
      legalUserTag=checksysUser()  '系统用户验证
      if legalUserTag=true then
         If Session("level")=1 and Session("admin")="True"  Then
            Response.Redirect("manage.asp")
            Response.End
         End If        
        If Session("level")=2  Then
        Response.Redirect("main.asp")
        Response.End
        End If
        If Session("level")=3  Then  
         set rs=server.createobject("adodb.recordset")
         Sql="SELECT * FROM kaoqing_table WHERE user='"&username&"' and recordYear="&Year(Now())&" and recordMonth="&Month(Now())&" and recordDay="&Day(Now())&""   '提取表中本年本月本日的Iswork值。
         If  Iswork=0 Then '如果Iswork=0,则登录并记录登录年月日及时间
         insertsql="select * from kaoqing_table"
         rs.open insertsql,db,1,3
         rs.addnew
         rs("user")=username
         rs("recordYear")=Year(Now())
         rs("recordMonth")=Month(Now())
         rs("recordDay")=Day(Now())
         rs("recordTime")=Time
         rs("Iswork")=1
         rs("note")=note
  
         rs.update
   
         rs.close
        set rs=nothing
       Response.Redirect("normal.asp")
         Response.End
         else '否则说明你已登录过了
         Response.write "你已登录过了"
         End If
         End If

         else
        errmsg="<font color=#FF0000><b>用户名或者用户密码错误，请重新输入！</b></font>"
      end if
    else
      errmsg="<font color=#FF0000><b>附加码输入错误，请重新输入！</b></font>"
    end if
  else
    errmsg="<font color=#FF0000><b>用户名输入有误，请重新输入！</b></font>"
  end if
end if
%>